Ejector lamp socket



Fb. 25, 1941. 1-z ETAL 2,233,146

EJECTOR LAME SOCKET Filed Jan. 8. 1940 UNIT'ED sures 2,233,146 -nmcronLAMP socxm:

Morris Schwartz, New York, andWilliain A Castedello, Huntington, N. Y. 7

Application January 8, 1940, Serial No. 312,900

5Claims.

Our invention relates to a lamp socket arrangement, particularly of thetype in which the lamp may be readily eiected when desired.

An object of the invention is the production of a lamp socket which isparticularly applicable for flash light lamps used in photography.

A further object of the invention is the utilizatien of a lamp socket inwhich a lamp may be readily insertedand locked within said socket andsaid insertion compressing a spring. Afl:er said lamp shall have servedits purpose said lamp can be ejected from said socket by simplycompressing a pair of ears or projections on said socket with theflngers, said mcvement causing the unlocking of said lamp in saidsocket, said unlocking causing sald lamp to be ejected under the fordpressure of the compressed spring aforesaid.

Flash lainps are commonly emploed in the photographie art. The bulbs ofsaid lamps after being flred or flashed are subject to a hightemperature for a certain period after the fiashing thereof, and whilesaid bulb is subject to said high temperature, the same cannot behandled without burning' the flngers.

It is often desirable to photograph a number of separate objectives inrapid succession. The replacement of the flashlight bulbs in ordinarytype lamp sockets cannot be readilymade until the lamp bulb is coolenough to be handled and delay in picture taking is a result therefrom.

By means of our invention the rapid replacement of lamps in the manneras outlined is possible.

In further description of our invention attention is called to thedrawing, in which Fig. 1 shows the lamp socket and bulb in perspective.

Fig. 2 is a cross-section of the socket and bulb arrangement.

Fig. 3 is a detail of the shell housing of the lamp socket on a line 33of Fig. 2.

Fig. 4 is a longitudinal section of the shell housing.

Fig. 5 shows a detail of the slot through which means the lamp bulb islocked through the meis the shell proper of said socket assembly. 24. 24are the insertion slots on the shell 23a, the end of each of saidslotsiras an L-shaped or key locking portion 2la which serves as a lockingmedium for the pins 22, 22 that are mounted oppositely square shapedapertures 21h. Said apertures are formed by being* punched or indentedon three sides of said apertures, the fourth side 21c being bent inward.The bent in portion 210 of each one of the apertures 21b serves to actas a limiting stop for the pins 22, 22 on the base neck 2l of the tionpreparatory to the ejection thereof upon the application of the springreleasing means which when applied partially rotates the lamp 2l], saidmovement causing the pins 22 and 22 of said lamp to move clear of theextension key slot 24a. The a.foresaid movement will be further dscribedhereinater.

. 216 is 9. section of the collar 21 which issecured to the shell 23a bymeans of rivets 21f or other securing means.

The collar 21 is provided with a pair of ears or projections 28, 28,said ears having a coiled spring 28a between them. The function of thespring 28a is to preserve a degree of spacing between the ears 28, 28and to cause the section 211c of collar 21 to retract. j

The section 217c et the collar 21 has a. limiting rotating' xriovementaround the shell 23 upon pressing the cars 28, 28 together with theflngers.

lamp and holding said lamp 20 in cocked posi- Said section 21k is heldin normal position by means of the spring 28a. The bent in portions 21eet the apertures 21b form the limiting stops for the respective pins 22and 22 of the lamp 20 when said lamp is turned clockwise to the limit ofmovement provided by'the bent in portion 210 of the aperture 21b.

Secured to the lower section of the socket assembly 23 is a flangedcollar 29, saidcollar in turn is secured to a screw plug 30, thefunction of the latter being well-known as a connectirig meansbyscrewing into a standard lamp socket.

On the inside of the screw plug.30 is a contact pin 31 which isconnected to the lower base secthrough the insulating washers 26 and 26said wire being bared and fiattened into 9. contact medium at the uppercenter of the washer 26 said contact medium forms an electricalcontinuity connection with the contact pin 3! and the base contact 85 ofthe lamp bulb 20.

Operation The user of the appiiance first inserts the flash lamp intothe socket arrangement and locking said lamp in the socket in the usualmanner ct lamp insertions in a bayonet type socket.

-After the lamp has been flashed, the bulb thereof becomes considerablyheated, and under ordinary circumstances said lamp would be difflcult ofremoval trom the socket owing to the heating thereoi.

'Ihe user in utilizing the present invention simply presses together theears 28 and 28 and against the spring 28a. The aforesaid movementpartially rotates the collar 27 which movement causes the lamp 20 andwith it the pins 22 and 22 to move out of the L-shaped or key lockingportion 24:: in which said pins were originally set and to move saidpins in direct line with the slots 24 and 24 In the position as statedthere being no obstacle to detain the lamp bulb in said socket, thespring 21 which had been previously compressed'upon the insertion of thelamp in its normal setting position in said socket is now free toexpand, said spring expansion causing the immediate expulsion or thelamp bulb atoresaid.

The utilization of the invention is best exemplifled when used inconnection with a photographie camera. After picture exposure in whichthe flashing of the fiashlamp 20 has been utilized, the user of thecamera by simply pinching or pressing the ears28 and 28' with theflingers of the right hand against the intervening spring 28a. andholding the camera with the left hand will cause the lamp 20 to beeiected from said socket arrangement. In this manner a new lamp can besubstituted in lieu et the exhausted lamp without danger 01 burning theflngers which would be likely when attempting to unscrew the A lamp tromthe lamp socket in the usual manner.

It will readily be seen that our invention can be considerably modifiedwithout departing from the spirit thereot. For example, the fingerreleasing means on the lamp socket may be conhas an applicabflity forpurposes other than that pertaining to the photographie field. Forininstance, the ejector socket may be used in connectlon withilluminated electrlcal siens, for antomobile lighting, or for liglitinglocations in which it is diflicult to remove lamps while said lamps arelighted. A

Now having descrlbed our invention. what we claim 13:

1. In a lamp socket, said socket including a v shell into which the basesection 01 a lamp is inserted, said lamp having a locking pin ar-.

rangement thereon, lamp locking means in said socket, said locking meansincluding a longitudinal slot arrangement, said slot arrangementcomprising an L-shaped portion, 9. spring in said socket, said springbeing compressed upon the insertion of said lamp into said socket andlocked therein; said locking efiected by the turning of said lamp insaid socket; finger pressed releasing means mounted on said socket, saidreleasin means engageable with said locking pin arrangement to causesaid lamp in said socket and the locking pin arrangement thereon to berevoiubiy moved out of said L-shaped portion of said longitudinal slotarrangement whereby said lamp is unlocked from said socket and expelledtherefrom through the medium of the expansion of said spring in thesocket aforesaid.

2. In a lamp socket of the class described, said socket including ashell into which a lamp is inserted, a pair of slots each' of which hasextended L-shaped portions in said shell into which a pair of proJectingpins mounted on the neck of said lamp are fitted upon the insertion ofsaid lamp in said socket, said lamp and the projecting pins thereonbeing turned in said socket and held in said L-shaped portion of saidslots, a spring within said shell that is compressed upon the insertionof said lamp; flnger controlling means mounted on said shell, saidfinger controlling means when moved and coacting with said projectingpins causing the partial rotation of said lamp from its locked orsecured position whereby said lamp becomes unlocked and released, saidrelease causing the release of the compression of said spring wherebysaid lamp is expelled from the socket aforesaid.

3. In a lamp socket including a shell into which a lamp having pinlocking means on the neck thereof is inserted, slotted means in saidshell, said slotted means including a L-shaped locking portion forlocking and holding said lamp in said socket, a spring within saidshell, said spring compressed by the insertion of said lamp in saidshell; finger controlled means mounted on the outer circumierence ofsaid socket, said flnger controlled means contiguous to said pin lockingmeans of said lamp, and upon pressure oi said finger controlled means tocause said lamp to be rotatably moved and unlocked and thereby releasedfrom said L-shaped locking portions of said-slotted means whereby saidlamp is eiected from said socket through the medium of the expansion ofthe spring aforesaid.

4. In combination, a lamp socket, said socket to receive a lamp thereinhaving pin locking means on the neck thereoi, the insertion of said lampto cause the compression et a spring within said socket; lamp ejectingmeans included in said socket, said spring included in said ejectingmeans, said ejecting means also including flnger controlled releasingmeans, said releasing means 4 locking means thereon that coact withcooperat- 7 ng locking means in said socket, finger operated re]easingmeans attached to the shell et s'aid socket, said releasing meansconflguous to and coacting with said locking means on said lamp,

5 .the movement of 52114 .releasing menus causing the unlocking of saidlamp in said socket,and

spring means, in said socket, said spring means being compressed uponthe insertion of said lamp lamp-thereby causng the expulsion thereoffrom the socket aforesaid.

' MORRIS SCHWARTZ.

- WILLIAM CASIEDELL.

